Improvement in stools for casting pipes



i CHARLES J. ELLIS.

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CHARLES J. ELLIS, OF LOUISVILLE, KENTUCKY.

IMPROVEMENT IN STOOLS FOR CASTING PIPES.

Specification forming part of Letters Patent No. 126,043, dated April 23, 1872.

Specification describing an Improved Stool to be used in (lasting Pipe, invented by CHARLES J. ELLIS, of Louisville, in the county of Jefferson and State of Kentucky.

The invention relates to the stools which are usually placed at the bottom of pits wherein pipes of various sizes are cast into form. It will first be fully described and then clearly pointed out in the claim.

Figure 1 is an elevation, and Fig. 2 is a plan view, of a continuous and movable circular stool as invented by me.

A represents the stool, which consists of circular arcs, B, made of iron, wood, or other material, and of suitable lengths. They are jointed at the ends b, and secured with a pin, clamp, or bolt. These arcs B are movable, and can be contracted or expanded by increasing or lessening their number so as to suit different sizes of flasks. O, in Fig. 1, represents a flask; and D, a core-guide or support. A series of these flasks G and coreguides D are placed in the pit so as to rest upon two of the arc-rings B. After one size of pipes has been completed in this flask and it is desired to make others of a less size, one or more arcs is removed from the outer circle, and the latter is drawn toward the inner one, or vice versa. Three circles may be used, as shown in Fig. 2, when the inner and outer maybe stationary, the middle one being adjusted toward either. The stools of different form which are now in useare separate and detached from each other. Hence it takes more care and time to place the flasks on such stools than on my continuous stool. Again, if a set of ordinary separate stools have been placed in the pit for one-sized flask and it is desired to use the pit for one of a different size, it then becomes necessary to'remove all the small stools from the pit and to insert others, thus losing much time. I avoid this waste of time entirely by my circular continuous stool, since it becomes necessary only to move an inner ring further from or nearer to the outer one and the change is made. I thus accomplish in a half hour What would require a half day for the devices now in common use. Thus I render separate and distinct stools for different sizes of flask unnecessary, and thereby produce economy in the cost.

Having thus described my invention, what I claim as new,and desire to secure by Letters Patent, is-

The stool A, of a circular continuous form,

made in arc-sections B, and adjustable in the P manner and for the purpose described.

CHARLES J. ELLIS.

Witnesses SAML. A. MILLER, J os. GRIFF. 

